For remote login to database home page, check out
http://docs.oracle.com/cd/B25329_01/doc/admin.102/b25107/getstart.htm#CHDCEAGE
and to enable remote login
http://docs.oracle.com/cd/B25329_01/doc/admin.102/b25107/network.htm#BHCBCFBA
Do this with sqlPlus and you should be able to access remote database homepage from local computer.

The remote login worked, thank you for the idea "orafad". I can't believe how I didn't think of this before. What I did was to login to the VPN and just enter the IP of the database server e.g.: "IP:8080/apex" and I was able to access the database home page and monitor the storage. Thank you all for the replies.